To discern means to notice or understand something that isn't immediately obvious, using careful attention and good judgment. When you discern something, you look and listen carefully, thinking about what you're seeing or hearing to figure out what's really going on.

A detective discerns clues at a crime scene that others might walk right past. A skilled reader discerns the author's deeper meaning beneath the surface of the story. You might discern that your friend is upset even though they're smiling, because you notice something off about their voice or the way they're avoiding eye contact.

Discernment requires both attention and wisdom. It's not enough to just observe: you need to interpret what you're observing correctly. A music teacher might discern which students practiced this week and which didn't, not because they asked, but because they can hear the difference in how they play.

The noun form is discernment, which means the ability to make these kinds of careful judgments. Someone with good discernment can tell the difference between a genuine opportunity and a scam, or between a true friend and someone just acting friendly. Developing discernment takes practice: the more you pay attention to details and think carefully about what they mean, the better you get at seeing what others miss.